Sonic the Hedgehog: Official Game Guide, Sonic Wiki Zone

Sonic the Hedgehog: Official Game Guide is a strategy guide book published by Prima Games in the United States for Sonic the Hedgehog (2006).

Sonic the Hedgehog 2 - Wikipedia

Sonic Advance — StrategyWiki Strategy guide and game reference wiki

Sky Base Zone - Sonic Retro

Sonic CD (2012) - PCGamingWiki PCGW - bugs, fixes, crashes, mods, guides and improvements for every PC game

Sonic the Hedgehog Modern Style Guide, Sonic Wiki Zone

Sonic the Hedgehog: The Movie, Sonic Wiki Zone

Sonic Adventure 2: Battle Strongest Strategy Guide

Sonic Spinball - Wikipedia

Sonic X, Sonic Wiki Zone

Sonic Advance 2 - Wikipedia

Sonic the Hedgehog Modern Style Guide, Sonic Wiki Zone

Sonic the Hedgehog 2 – Wikipédia, a enciclopédia livre

LABYRINTH ZONE — Sonic The Hedgehog Genesis (Game Boy Advance) — Audio

Sonic Advance — StrategyWiki Strategy guide and game reference wiki